19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The oxidation number of nitrogen in NaNO₂ is
The oxidation state of chromium in Cr(CO)₆ is:
Oxidation number of nitrogen in (NH₄)₂SO₄ is
In the following equation MnO₂ acts as MnO 2H O 2e MnO 4OH →
Assertion (A): SO₂ and Cl₂ are both bleaching agents Reason (R): Both are reducing agents
Assertion (A): H₂O₂ can acts as an oxidizing agent. Reason (R): All the peroxides behave as oxidizing agents only.
In the reaction 2FeCl H S 2FeCl 2HCl S →
In the reaction 3Br 6CO 3H O 5Br BrO 6HCO →
In the reaction o 5 2 3Cl 6NaOH Na ClO 5Na Cl 3H O → The element which loses as well as gains electrons is
The number of electrons lost in the following change is Fe H O Fe O H →
Which of the following is the best description of the behaviour of bromine in the reaction given below? o H O Br HOBr H Br →
In the reaction o o ½ K O KO →
In the reaction, SO 2H S 3S 2H O → the substance oxidized is
In the equation NO H O NO 2H ne → n stands for
An element exhibits an oxidation state -2. How many electrons are present in its outer shell?
The oxidation state of C in diamond is
The oxidation number of C in HNC is
An element that never has a positive oxidation state in any of its
Nitrogen show different oxidation states in the range
The oxidation number of xenon is XeOF₂ is
An oxidation process involves
For the reaction, H PO NaOH NaH PO H O → What is the equivalent weight of H₃PO₂? (mol. wt. is M)
n-factor of Ba(MnO₄)₂ in acidic medium is
aK Cr O bKCl cH SO → xCrO Cl yKHSO zH O The above equation balances when
In the neutral or faintly alkaline medium, KMnO₄ oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from (NEET 2022)